IUBio Biosequences .. Software .. Molbio soft .. Network News .. FTP

Sycamore tree losing leaves

JWGruber jwgruber at aol.com
Mon Apr 25 19:00:07 EST 1994

In article <kresgeCosrF8.LIK at netcom.com>, kresge at netcom.com (Jim Kresge)

>Spring comes in Northern California.  The leaves come out on my big 
>sycamore tree in front of the house.  Then, mysteriously, the leaves wilt 
>and turn brown (some of them stay green though).  Then some leaves fall 
>off.  Later in the June time frame the leaves comes out again and reach 
>their full size, then fall off again in the late fall.  I have heard that 
>this is because of a elm disease-like fungus.

>Can anybody advise what this is and what the treatment is?

I have several large sycamores (Platanus ociidentalis) on a farm in
Pennsylvania, including a 150 - 200 year old tree with a 14-foot circumference
and have observed identical "symptoms" in wet Spring years. The cause of leaf
drop was identified as an anthracnose fungus; while I imagine it can be
combatted with fungicides, I have not seen any evidence that teh trees are
adversely affected in the long run. As you noted, by June, a replacement set of
leaves has unfolded. In dry Spring years, we do not have the same leaf drop in

John W. Gruber
Gladwyne, PA
jwgruber at aol.com

More information about the Plantbio mailing list

Send comments to us at biosci-help [At] net.bio.net